-> Change the assembly version of the Droid System.Windows project (in AssemblyInfo.cs) to:

2.0.5.0

In my testing, I didn't seem to need to disable strong name verification. So I don't think it will present any extra barriers for newbies – once you have these changes made they'll just need to get your code and it will build correctly.

However, if you do run into problems, try running the following from an admin VS command prompt:

These changes may sound trivial, but they've been making code sharing very hard since May this year - and it's great that I can now dropbox/skydrive share my projects and solutions again now between Mac and PC :)